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# prompt
#
# bash prompt configuration
# Declared global so that functions that run in PS1 can access
declare -gA _PROMPT_COLORS=(
[bold_black]=$'\001\e[01;30m\002'
[bold_red]=$'\001\e[01;31m\002'
[bold_green]=$'\001\e[01;32m\002'
[bold_yellow]=$'\001\e[01;33m\002'
[bold_blue]=$'\001\e[01;34m\002'
[bold_magenta]=$'\001\e[01;35m\002'
[bold_cyan]=$'\001\e[01;36m\002'
[bold_white]=$'\001\e[01;37m\002'
[reset]=$'\001\e[00m\002'
)
_prompt_shlvl() { ((SHLVL > 1)) && printf '%s:%s ' $'' "$SHLVL"; }
_prompt_jobs() {
local job_count
job_count=$(jobs | wc --lines)
((job_count > 0)) && printf '%s:%s ' $'' "$job_count"
}
_prompt_git() {
local branch ahead behind diverge=
# HEAD name (commit SHA in detached HEAD)
branch=$(git symbolic-ref --short HEAD 2>/dev/null) || branch=$(git rev-parse --short HEAD 2>/dev/null) || return
branch="${_PROMPT_COLORS[bold_green]}($branch)${_PROMPT_COLORS[reset]}"
if read -r ahead behind < <(git rev-list --left-right --count "HEAD...@{u}" 2>/dev/null); then
((ahead > 0)) && diverge+="${_PROMPT_COLORS[bold_green]}↑${ahead}${_PROMPT_COLORS[reset]}"
((behind > 0)) && diverge+="${_PROMPT_COLORS[bold_red]}↓${behind}${_PROMPT_COLORS[reset]}"
fi
printf '%s%s ' "$branch" "${diverge:+ $diverge}"
}
# The quoted parts are expanded on each prompt, the unquoted parts immediately
PS1=${_PROMPT_COLORS[bold_green]}'[\u@\h'${_PROMPT_COLORS[bold_white]}' \W $(_prompt_git)$(_prompt_shlvl)$(_prompt_jobs)]\$'${_PROMPT_COLORS[reset]}' '
# vim: ft=bash
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